#ifdef GLES
precision highp float;
#endif
uniform mat4 u_mvp;
attribute vec4 a_pos;

void main() {
    gl_Position = u_mvp * a_pos;
}

$$

#ifdef GLES
precision highp float;
#endif
uniform vec4 u_color;

void main() {
    gl_FragColor = u_color;
}
